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  • Marziali, Laura  (4)
  • 1
    Online Resource
    Online Resource
    Corrections and Additions to Descriptions of Some Species of the Subgenus Orthocladius s. str. (Diptera, Chironomidae, Orthocladiinae)
    MDPI AG ; 2022
    In:  Insects Vol. 13, No. 1 ( 2022-01-02), p. 51-
    Details
    In: Insects, MDPI AG, Vol. 13, No. 1 ( 2022-01-02), p. 51-
    Abstract: The larvae of some species of the subgenus Orthocladius s. str. (Diptera, Chironomidae) are here described for the first time with corrections and additions to the descriptions of adult males and pupal exuviae. The identification of larvae is generally not possible without association with pupal exuviae and/or adult males, so the descriptions here are based only on reared material or on pupae with the associated larval exuviae. Usually, Chironomidae larvae can be separated on the basis of morphometric characters, the most discriminant ones are: (1) the ratio between the width of median tooth of mentum (Dm) and the width of the first lateral tooth (Dl) = mental ratio (DmDl), (2) the ratio between the length of the first antennal segment (A1) and the combined length of segments 2–5 (A2–5) = antennal ratio (AR). The shape of mandible, maxilla, and other body parts are almost identical in all the species considered in this study. The larva of Orthocladius (Symposiocladius) lignicola is very characteristic and can be separated by the shape of mentum and the larvae of all the known species of Symposiocladius are characterized by the presence of large Lauterborn organs on antennae and of tufts of setae on abdominal segments. The larvae of Orthocladius (Orthocladius) oblidens and Orthocladius (Orthocladius) rhyacobius can be distinguished from other species basing on their large Dm and to each other by AR. A principal component analysis was carried out using 5 characters: (1) Dm, (2) Dl, (3) length of A1, (4) width of A1 (A1W), (5) combined length of segments 2–5 (A2–5). The most discriminant characters were Dm and A1, confirming that DmDl and AR can be used to separate species at larval stage, but the large superposition of morphometric characters in different species confirms that association with pupal exuviae is in any case needed to identify larvae. In future perspective, the development of reference DNA barcodes from specimens identified by specialists is recommended since possibly the best tool for larvae identification, but association of barcodes with morphotypes is in any case fundamental.
    Type of Medium: Online Resource
    ISSN: 2075-4450
    URL: Article
    DOI: 10.3390/insects13010051
    Language: English
    Publisher: MDPI AG
    Publication Date: 2022
    detail.hit.zdb_id: 2662247-6
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  • 2
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    Revision of type and non-type material assigned to the genus Orthocladius by Goetghebuer (1940–1950), deposited in the Royal Belgian Institute of Natural Sciences (Diptera: Chironomidae)
    National Museum, Czech Republic ; 2017
    In:  Acta Entomologica Musei Nationalis Pragae Vol. 57, No. 2 ( 2017), p. 723-749
    Details
    In: Acta Entomologica Musei Nationalis Pragae, National Museum, Czech Republic, Vol. 57, No. 2 ( 2017), p. 723-749
    Abstract: Selected type and non-type material belonging to the genus Orthocladius van der Wulp, 1874 (Diptera: Chironomidae) sensu GOETGHEBUER (1940-1950), deposited in the Royal Belgian Institute of Natural Sciences (RBINS), originally comprising specimens dry pinned or stored in isinglass, were mounted on microscope slides and re-examined. Other chironomids present in the RBINS collection belonging to other genera were also examined. Fifty slides were prepared and identified to species, or to generic level when the condition of the specimens did not allow species identification. The following types, representing taxa formerly considered as nomina dubia, were examined and the concerned species are stated here as valid: Georthocladius collarti (Goetghebuer, 1941) comb. nov., Georthocladius scaturiginis (Goetghebuer, 1940) comb. nov., Lapposmittia succinea (Goetghebuer, 1942) comb. nov., Orthocladius (Euorthocladius) tolleti Goetghebuer, 1944 (new subgenus placement), Orthocladius (Orthocladius) timoni Goetghebuer & Timon-David, 1939, Pseudorthocladius hockaiensis (Goetghebuer, 1933). Orthocladius (Orthocladius) mitisi Goetghebuer, 1938, previously stated as junior synonym of Orthocladius (Orthocladius) glabripennis (Goetghebuer, 1921), is reinstated as valid species. The following new synonyms are proposed: Georthocladius (Georthocladius) collarti = Parachaetocladius retezati Albu, 1972: 19, syn. nov.; Cricotopus (Paratrichocladius) rufiventris (Meigen, 1830) = Orthocladius franzi Goetghebuer, 1949, syn. nov.; Cricotopus (Paratrichocladius) skirwithensis Edwards, 1929 = Orthocladius nigritus Goetghebuer, 1938, syn. nov. = Paratrichocladius spiesi Ashe & O’Connor, 2012; Hydrobaenus distylus (Potthast, 1914) = Orthocladius antennalis Goetghebuer, 1944, syn. nov. Lectotypes of Orthocladius collarti Goetghebuer, 1941, Orthocladius antennalis Goetghebuer, 1944, Orthocladius timoni Goetghebuer & Timon-David, 1939, and Orthocladius hockaiensis Goetghebuer, 1933 are designated. Non-type material assigned to Orthocladius was also mounted on slides and identified. Although a list of the non-Orthocladius taxa is also provided, no taxonomic changes are proposed for the latter.
    Type of Medium: Online Resource
    ISSN: 1804-6487 , 0374-1036
    URL: Journal
    URL: Article
    DOI: 10.37520/aemnp
    DOI: 10.1515/aemnp-2017-0097
    Language: Unknown
    Publisher: National Museum, Czech Republic
    Publication Date: 2017
    detail.hit.zdb_id: 2559074-1
    SSG: 12
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  • 3
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    An updated list of chironomid species from Italy with biogeographic considerations (Diptera, Chironomidae)
    California Digital Library (CDL) ; 2019
    In:  Biogeographia – The Journal of Integrative Biogeography Vol. 34, No. 0 ( 2019-05-14)
    Details
    In: Biogeographia – The Journal of Integrative Biogeography, California Digital Library (CDL), Vol. 34, No. 0 ( 2019-05-14)
    Type of Medium: Online Resource
    ISSN: 2475-5257 , 1594-7629
    URL: Article
    DOI: 10.21426/B634043047
    Language: Unknown
    Publisher: California Digital Library (CDL)
    Publication Date: 2019
    detail.hit.zdb_id: 2927240-3
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  • 4
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    Factors Controlling Morphotaxa Distributions of Diptera Chironomidae in Freshwaters
    MDPI AG ; 2022
    In:  Water Vol. 14, No. 7 ( 2022-03-23), p. 1014-
    Details
    In: Water, MDPI AG, Vol. 14, No. 7 ( 2022-03-23), p. 1014-
    Abstract: Many hydrobiological studies have dealt with the autecology of species within the family Chironomidae and discussed factors affecting species distribution. The aim of the present research is to consider the most important factors affecting chironomid species distribution. Habitat type (lentic, lotic, krenal, rhithral, etc.), water temperature, conductivity, and trophic status are confirmed key factors controlling their assemblage structure. Here, we introduce the term “morphotaxon” as the taxonomic level, intermediate between genus and species, more suitable to describe the ecological responses of Chironomidae. The present uncertainty related to species identification is at the base of the proposal, with the assumption that species belonging to the same morphotaxon have similar ecological needs. In this study, this hypothesis was found to be valid, with few exceptions represented by species-rich genera (e.g., Tanytarsus, Paratanytarsus). The morphotaxon can be viewed as an interim measure waiting for the implementation of new complementary approaches, such as species identification with molecular methods.
    Type of Medium: Online Resource
    ISSN: 2073-4441
    URL: Article
    DOI: 10.3390/w14071014
    Language: English
    Publisher: MDPI AG
    Publication Date: 2022
    detail.hit.zdb_id: 2521238-2
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